Having grown up in a small town in southern Missouri I can tell you this....it's like anything else, you will have a very very small,percentage of gals that will be curious. That is with any race though I believe.
My graduating class had 37 people in it, there was not another ethnicity other than white within 50 miles. Girls did not even talk about black guys. There was one gal in my class that went off to college. I heard that after she had been there she came home for the holidays one year and showed up with her black boyfriend. Now this was quite the shock to her family. There was no lynching..no one chased him out of town..in fact I heard that while the reunion was, uneasy for a bit..all in all it went ok. She was the talk of the town for some time though. Though like everything else people forgot about it. Now another gal that was a class behind me, she went off to a large school far from home. She was raised in one of those strict god fearing home types...wasn't allowed to date in H.S....and the gal was drop dead gorgeous. Now she went off and went absolutely over the top...and apparently BBC was her flavor of choice. I only know about this because I dated her college roommate whom also went to our school briefly. We ran into each other years after they had both graduated and she gave me the goods on her. She stated that it approached the point of ridiculousness...she said she ran different black guys through there weekly...for 3 years until finally they parted ways...she estimated that she had to be somewhere in the high double digits.
Now with that said, both of the ladies ended up returning to there small towns, or a little bit larger of a town close by but still very country. They both married white guys, raised white *******.
So I think saying that country girls are under the control of BBC is a stretch to say the least. While a black dude may nail him the occasional farmers *******....white dudes also land them the occasional inner city black female.
By and large country girls are till country..there is no real opportunity for them to meet black guys and black guys are not going to go into places like ..Warsaw Missouri...trying to pick up white girls anymore than white guys are going to go into Caprini Greens in Chicago to pick up black girls.
I do think that are society is becoming more and more sexually evolved every day. More and more ethnicities are not only interracially dying....but breeding as well
A bit long winded but that's my take..lol